3xCree star R2 - the best reflector for bike light?

[dsvilko]

I am trying to decide what reflector to buy for my homemade 3x Cree R2 light. The beam should not be too tight (maybe in the 20-40 degrees range?). What do you think about these reflectors:
http://www.dealextreme.com/details.dx/sku.1920
http://www.dealextreme.com/details.dx/sku.1911
http://www.dealextreme.com/details.dx/sku.1912
http://www.dealextreme.com/details.dx/sku.1916

Most of the reflectors put out a approximately 10 degree beam. Isn't that too concentrated? I have got no experience with the high power bike lights so I am only guessing.
Also, what's better - a reflector or a lens?
Suggestions, recommendations, personal experiences... are most welcome!

 

[Drewfus2101]

For those cheap of prices, I would just try them all. I would eventually find a use for them all. And 10* is not that narrow. You will be suprised when you try it out. The one with the rough surface will have a larger side spill than the others.

 

[Calina]

Don't forget to post your findings and some beam shots.

 

[dsvilko]

As I am on a really tight budget, I don't think I'll buy them all.
I'll take http://www.dealextreme.com/details.dx/sku.1920 as it seems it's got the best reviews. The beam is not very wide but I guess I can always mount a diffuser in front of it (Scotch tape?).
For $40 I will get 4xCree R2 star mounted emitters, 5 lenses, 4 regulators and a bike mount. I plan to make one 3 led light and also modify my current bike light (2.5W halogen + 2 leds) with the fourth Cree led. Not bad for $40.